Internal-combustion engine.



L. '$GOTT. INTERNAL COMBUSTION ENGINE.

APPLICATION-FILED OUT. 22, 1912. 1 1973 089; 1 Patented July 14, 191% 2 SHEETS-SHEET l.

.L scotcT. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED OCT. 22, 1912.

1,103,089. Patented July 14,1914,

2 SHEETS-SHEET 2.

I Z Za/Y UcoZZf' To all whomit ma t concern: Soo'rna c1t1-e UNITED STATESPATENT OFFICE.

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INTERNAL-COMBUSTION ENGINE.-

S pecifieation of Ilietters Patent.

Application filed October 22, 1912. Serial No. 727,193.

Be it known that I, LELAND zen of the United States residing at St.

"specification. p 1 (I My 'nvention relates to internal. -combus-- the cylinder Joseph, State of Missouri, and useful Improvements inlnternal Combustion Engines, of whichthe following is a 'tion engines of the two-cycle type and has; for one 'of its objects the provision of a fixedr head within the cylinder and an inverted cup-shaped piston slidablymounted within; the explosive mixture; being: supplied within'the piston and compressedthe driven stroke of .the piston and then suppliedto the cylinder to be exploded i ter at times with an opening 17 in the piston during in the next cycle of the engine.

. Another-object of my invention is the provision of a fresh air'supply for driving out the burned gases after the explosive cycle prior 'to the admission of the. explosive charge, said fresh air being under control of.

a'=valve operat'ed by' the crank shaft of the engineato open andclose the valve at proper intervals fon the correct operation Lofthe engine.

. My invention will be described in detail hereinafter and illustrated in the accompanying drawings, in which,

Figure 1 is a side view in elevation of an explosive engine constructed to conform with my invention; Fig. 2, a verticalsectional view through the center of the cylinder and crank case; and Fig. 3, a detail of the-valve operating mechanism.

In the drawings similar reference characters will be used to designate corresponding parts throughout the several views.

My improved explosive engine comprises the crank case 1 within which is journaled the crank shaft 2 having the ordinary construction of crank arms 8 with the crank pin 4 on which is journaled one terminal of the piston rod '5.

The cylinder 6 of my improved engine is provided with the double wall construction ordinarily found in explosive engines to permit of the passage of water around the cylinder to keep it in a cool condition. The lowerterminal of the cylinder 6 'is extended into the crank case 1 as shown at 7 and is provided with a laterally extending flange 8 to which is secured the horizontal flange 9 of an inverted cup-shaped head 10 extending in the county of Buchanan andhave invented certain ,new

1' upwardly into the cylinder, said cup-shaped head '10 being formed with vertical slots 11 for the purpose hereinafter stated.

Slidably mounted between the inner wall ofthecylinde r 6 and the outer wall of the head 10'is an inverted cup-shaped piston 12 that is pivotally connected as shown at'13 to the upper terminal of the piston rod and said piston adapted to slide in the slots 11 of the head 10. The upper portion of the head. is provided with the ordinary packing 14 that engages the inner surface .of the piston. 12 and the upper portion of the piston 12 is provided with the packing 15 that engages the inner portion of the cylinder6.

16 indicates an inlet vport arranged in the side ofthe cylinder 6 and adapted to regis- 12 to admit the explosive charge to the interior of the piston above thehead' 10, and 18 indicates the exhaust port communicating with said cylindert.

' 19 indicates a by-pass arranged in the casing of the cylinder6-having its lower openin substantial alinement with the inlet port 16, while its upper opening is alined with the lower portion of the exhaust port 18.

20 indicates a cover plate mounted on the cylinder 6 and. covering the by-pass, said cover plate being held in position by means of a screw bolt 21 or other analogous structure.

22 indicates an air duct arranged in the casing of the cylinder 6 and communicating with the interiorof said cylinder at a'point just above the upper opening of the by-pass 19 and-'23 an osc llating valve mounted in said fresh air duct, said valve being operated by means of an arm 24 secured to one end thereof and having pivotally secured thereto a link 25 that is operatively secured to a disk 26 rotatably mounted on the exterior ofthe crank case 1 and driven by means of a belt 27 or other suitable power mechanism from the crank shaft 2.

28 indicates a baffle extending from the upper end of the cylinder 12, and 29 a spark plug of any suitable structure for igniting the compressed charge in the ordinary manner;

30 indicates a port in the side of the piston 12 that registers at times with the lower opening of the bypass 19 to permit of the passage of the explosive mixture from the interior of the piston 12 therefrom and through said by-pass 19 into the upper portion of the cylinder 6.

In operation it will beapparent that when the piston 12 is moving in an u ward direction to compress a charge withm the cylinder 6, a partial vacuum will be created within said piston above the head 10 and when the opening 17 alines with the inlet port 16, the explosive mixture will rush into the interior of said piston and fill it. Then when the explosive charge in the cylinder is fired to drive the piston 12 in a downward direct1on, the charge within the piston 12 will be.

- as the upper margin of the piston 12 has proceeded downwardly far enough to expose the upper opening of the bypass 19, the opening 30 in the side of the plston will be in alinement with the lower opening to the by-pass 19 and the compressed charge within the cylinder 12 will pass through said opening 30 and by-pass 19 into the cylinder 6 and complete the discharge of the burned gases from the cylinder, the valve 23 in the meanwhile having been closed by the operation of the engine. Thenwhen the piston 12 moves upwardly on another compression stroke, the operation heretofore described 1' inder being provided with an air duct, a.

valve rotatably mounted in the cylinder and controlling the passage of air through said air duct, said air ductbeiug adapted to admit air to the cylinder to clean it of burned gases and to cool it. internall means for actuating said valve, said'cylin er being also provided with intake and exhaust ports in one of its sides, and by a by-pass opposite thereto, the intake port being adapted to register with one o the apertures in the piston and the by-pass with the other.

In testimony whereof I aflix my signature in presence of, two witnesses.

LELAND SCOTT.

Witnesses J os. V. FENNELL, Gnonon KNIGHT.

Copies of this patent may be obtained for'iive cents each, by addressing the "Commissioner of 2mm, Washington, D. 0." 

